This is an excellent combo, a perfect match for purifying the indoor air and beautifying your small space or corner space, the combo contains one snake plant green (sansevieria) and one areca palm plant 

Sansevieria Green, also known as Mother-in laws-Tongue or Snake Plant is one of the most resilient plants and is one of the best air purifier in the indoor plant category. It's nearly impossible to destroy the plant's stiff upright sword-like green leaves, its endurance and purifying abilities makes it a great addition to modern homes or offices. Use this to make the air in your workspace or bedroom cleaner.

Areca Palm Once an endangered species, Areca Palm is the backbone of India's varied climatic seasons. One of the most under-considered plants in the field of indoor plants. This excellent air purifier is friendly and grows easily. Its soft leaves / flats grow outwards in a curved manner and add hot feel to any surface and can adapt to a variety of growing conditions.