The EUROLITE TPC-51S is an aluminum mounting coupler for tubes with diameters from 45 to 50 mm. It is equipped with an eyelet and has a maximum working load limit of 800 kg at a four-fold safety factor. The coupler is black and measures 16.5 cm in length, 5 cm in width, and 5.5 cm in height. Its net weight is 0.84 kg. The BGV C1 maximum load is 400 kg at an eight-fold safety factor.