Material: plastic, color natural, 0.015 in.45 degree chamfer on 0.135 in.Dia spring guide end; 0.171 in.Dia to 0.046 in.Dia 60 degree chamfer seating surface other end with 16 microfinish within 0.002 in.Total indicator reading dim 0.233 in.Lg, 0.171 in.Dia