he KQ2L union elbow fittings from SMC are quick and easy to install into your pneumatic fittings. These KQ2L union elbows are also more compact in design which means that these connectors can be used within a confined space. Union elbow fittings are to used to connect tubing at right angles. The new KQ2 range of products are lighter than previous models and have the advantage of improved insertion and removal forces.