21 mm Male and Female 5/8 x 11 Adapter (Seco)
The Seco 21mm Male and Female 5/8 x 11 Adapter is made of anodized aluminum with a height of up to 21 mm. Equipped with male and female 5/8 x 11 threading, this adapter has a center height of 135 mm when used with 230 mm sphere. Weighing only 0.05 lbs., the Seco adapter is efficient and durable.