Allied Electronics Corporation is the manufacturer of Telescoping Gland Bushing. Allied Electronics Corporation is an ISO 9001: 2000 certified company. The Telescoping Gland Bushing, MS 3420 tries to keep dirt, oil and moisture out of the end bell. The taping or wrapping wires are eliminated, since bushing protects wires going through clamp. The combinations of Telescoping Gland Bushing may be used to decrease cable entry diameter to improve sealing. The Telescoping Gland Bushing is made of Polychloroprene. These are available in various sizes like 10SL, 12S, 14S, 16S, 16, 18, 20, 22, 24, 28, 32, 36 and 40.