PIPES FOR THE FRONT TRIANGLE:
a) f31,8; f35; f41; f50; f60; i eliptyczna 74 x 40;
b) pipes with oval section;
c) pipes with triangular section,
PIPES FOR THE BACK TRIANGLE
2a. DOWN FORK:
a) from flat pipes with f22;
b) from oval pipes;
c) from shapes;
d) from a piece worked on CNC and oval pipe,
e) from rectangular pipe 17 x 27;
2b. UPPER FORK:
a) from pipe f18;
b) from pipe f22 or oval pipe.
these are from their webpage