diff --git a/src/stl_reader/_stlfile_wrapper.pyx b/src/stl_reader/_stlfile_wrapper.pyx
deleted file mode 100644
index 0ae2bfc..0000000
--- a/src/stl_reader/_stlfile_wrapper.pyx
+++ /dev/null
@@ -1,92 +0,0 @@
-# cython: language_level=3
-# cython: boundscheck=False
-# cython: wraparound=False
-# cython: cdivision=True
-
-# Import the Python-level symbols of numpy
-import numpy as np
-
-cimport numpy as np
-
-# Numpy must be initialized. When using numpy from C or Cython you must
-# _always_ do that, or you will have segfaults
-np.import_array()
-
-cimport cython
-from libc.stdio cimport FILE, fclose, fopen
-from libc.stdlib cimport free, malloc
-
-
-cdef extern from "stlfile.h":
-    ctypedef unsigned int vertex_t
-    ctypedef unsigned int triangle_t
-    int loadstl(FILE *fp, char *comment, float **vertp, vertex_t *nvertp, vertex_t **trip, unsigned short **attrp, triangle_t *ntrip)
-
-
-cdef class ArrayWrapper:
-    cdef void* data_ptr
-    cdef int size
-    cdef int dtype
-
-    cdef set_data(self, int size, void* data_ptr, int dtype):
-        """ Constructor for the class.
-        Mallocs a memory buffer of size (n*sizeof(int)) and sets up
-        the numpy array.
-        Parameters:
-        -----------
-        n -- Length of the array.
-        Data attributes:
-        ----------------
-        data -- Pointer to an integer array.
-        alloc -- Size of the data buffer allocated.
-        """
-        self.data_ptr = data_ptr
-        self.size = size
-        self.dtype = dtype
-
-    def __array__(self):
-        cdef np.npy_intp shape[1]
-        shape[0] = <np.npy_intp> self.size
-        ndarray = np.PyArray_SimpleNewFromData(1, shape, self.dtype, self.data_ptr)
-        return ndarray
-
-    def __dealloc__(self):
-        """ Frees the array. """
-        free(<void*>self.data_ptr)
-
-
-def get_stl_data(str filename):
-    cdef:
-        FILE *fp
-        char comment[80]
-        float *vertp
-        vertex_t nverts
-        vertex_t *trip
-        unsigned short *attrp
-        triangle_t ntrip
-        np.ndarray verts_arr, tri_arr, attr_arr
-        int out
-
-    fp = fopen(filename.encode('utf-8'), "rb")
-    if fp is NULL:
-        raise FileNotFoundError(2, "No such file or directory: '%s'" % filename)
-
-    # Call the STL file loader
-    out = loadstl(fp, comment, &vertp, &nverts, &trip, &attrp, &ntrip)
-    fclose(fp)
-    if out == -2:
-        raise RuntimeError("Invalid or unrecognized STL file format.")
-    elif out != 0:
-        raise RuntimeError("Unable to load STL.")
-
-    # wrap the vertex array
-    point_array_wrapper = ArrayWrapper()
-    point_array_wrapper.set_data(nverts*3, <void*> vertp, np.NPY_FLOAT32)
-    points = np.array(point_array_wrapper).reshape(nverts, 3)
-
-    # wrap the vertex array
-    tri_array_wrapper = ArrayWrapper()
-    tri_array_wrapper.set_data(ntrip*3, <void*> trip, np.NPY_UINT32)
-    indices = np.array(tri_array_wrapper).reshape(ntrip, 3)
-
-    return points, indices