Series Centers Extension Height Working Travel Max. Travel     mm / inches mm / inches mm / inches 1010/G 1.50 mm 8.30 / .327 2.40 / .095 3.00 / .118 1015/G 2.54 mm 12.80 / .504 3.50 / .138 4.40 / .173 1021/G 2.54 mm 10.50 / .413 4.00 / .157 5.30 / .209 1028/G 2.54 mm 10.50 / .413 4.00 / .157 5.30 / .209 1060/G 4.00 mm 10.70 / .421 4.40 / .173 5.50 / .217 1061/G 4.00 mm 16.20 / .638 5.60 / .221 7.00 / .276