The aluminium lightweight guage is designed to measure the thickness of leather and textiles. Different models includes:
Model J50, 10mm x 0.01mm measuring range, 50mm throat depth, 30mm dia. flat anvils
Model J100, 10mm x 0.01mm measuring range x 100mm throat depth, 30mm dia. flat anvils
Model J200, 10mm x 0.01mm measuring range x 200mm throat depth, 30mm dia. flat anvils
Model J200/30, 30mm x 0.01mm measuring range x 200mm throat depth x 30mm dia. flat anvils